Portable telephone



FIG. 1 is a front view of a portable telephone showing my design;

FIG. 2 is a back view thereof;

FIG. 3 is a side view thereof;

FIG. 4 is an opposite side view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a top view thereof;

FIG. 7 shows the first front perspective view of a portable telephoneshowing my design;

FIG. 8 shows a second front perspective view thereof; and,

FIG. 9 shows a back perspective view thereof.

The ornamental design for a portable telephone, as shown and described.